Fixes#664
This PR implements the idea described in
https://github.com/agent-substrate/substrate/issues/664#issuecomment-5499311489
It does more than Garbage Collection of snapshots, because we also got
rid of the Snapshot resource (from the DB/API).
Now, an external snapshot is owned by a single resource:
- An Actor owns the snapshot it writes at suspend
- A tag owns a copy taken at tag creation,
- An actor cloned from a tag borrows the tag's snapshot until its own
first suspend.
Garbage Collection: whoever created/owns the snapshot is the only one
who ever deletes them:
i.e., if an actor is deleted and it owns a snapshot. The underlying
snapshot is deleted with the actor.
this PR:
- Drops table actor_snapshots
- Keeps table actor_snapshot_tags
- Adds an object copy at tag creation, and an owned versus borrowed
distinction on the Actor
- Adds synchronous external snapshot deletion at actor suspend, at actor
delete, and at tag delete
> It's a good idea to open an issue first for discussion.
- [x] Tests pass
- [x] Appropriate changes to documentation are included in the PR
Three fixes from user feedback on the substrate-gke installer experience, consolidated per reviewer preference (replaces #1405, #1406, #1407):
**1. setup-gcp: enable `artifactregistry.googleapis.com` in bootstrap.** Bootstrap grants `roles/artifactregistry.reader` to the GKE node service account and the atelet workload-identity principal, and ko pushes the control-plane images through gcr.io's Artifact Registry backing — but `enableRequiredAPIs` never enabled the API, so a fresh project failed at image push/pull instead of step 1.
**2. teardown.sh: cover everything bootstrap creates, without a dev-env file.**
- Revoke atelet's project-level bindings (`roles/storage.objectAdmin`, `roles/artifactregistry.reader`), which `grant_atelet_permissions` adds but nothing removed.
- Delete the three Substrate monitoring dashboards, matched by the display names in `tools/setup-gcp/dashboards/`.
- Accept configuration from the environment when `.ate-dev-env.sh` is absent (missing variables are named specifically), so installers and one-liners can drive the script.
- Drop the kubectl cluster-admin precheck: every step talks to GCP, not the cluster, and it blocked tearing down a cluster that was already gone.
- `--all` now runs in the true reverse of bootstrap's setup order.
**3. commands.md: the `hack/install-demo-*.sh` scripts still exist.** The closing paragraph claimed they are gone, but `hack/install-ate.sh` still sources them and generates its `--deploy-demo-NAME` / `--delete-demo-NAME` flags from them.
This is the initial release of the Agent Substrate.
Agent substrate is a system built on top of Kubernetes which manages agent-like
workloads to achieve higher scale and efficiency than Kubernetes alone can
offer, with lower latency. It builds on top of Kubernetes features like
Pods and Pod autoscaling, but takes the Kubernetes control-plane out of the
critical path to achieve lower latency.
It can run on any Kubernetes cluster and does not inhibit “regular” use of
Kubernetes in any way. Kubernetes provides the infrastructure provisioning and
management for all types of workloads, while Agent Substrate provides
agent-specific scheduling and control.
At its core, Agent Substrate maps a larger set of “actors” (applications such
as agents) onto a smaller set of ready “workers” (Kubernetes Pods), relying on
the fact that agent-like applications tend to be idle most of the time to
achieve heavy multiplexing. It provides functionality to manage an actor’s
lifecycle (e.g. create/destroy, suspend/resume), to assign actors to workers in real
time, and to route incoming traffic to them.
Agent Substrate is intended to be a low-opinion system. The workloads it
manages don't have to be literal AI agents, but those are the best example of
the kind of applications it is designed for. It is not an SDK for building
agents, but rather a system for running them at scale.
Agent Substrate is currently in VERY early development. It is not ready for
production use, and the APIs are almost guaranteed to change. We are not
making any guarantees about backward compatibility at this stage, and
everything in this project may be changed.
Co-authored-by: Alex Bulankou <alexbu@google.com>
Co-authored-by: Benjamin Elder <bentheelder@google.com>
Co-authored-by: Bowei Du <bowei@google.com>
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Luiz Oliveira